Pansies.psm1
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using namespace PoshCode.Pansies using namespace ColorMine.ColorSpaces if(-not $IsCoreCLR) { Import-Module $PSScriptRoot\lib\net451\Pansies.dll } else { Import-Module $PSScriptRoot\lib\netstandard1.6\Pansies.dll } if(-not $IsLinux) { [PoshCode.Pansies.Console.WindowsHelper]::EnableVirtualTerminalProcessing() } function Get-Gradient { <# .Synopsis Get a range of colors from one or more colors #> [CmdletBinding()] param( # One or more colors to generate a gradient from [Parameter(Mandatory, Position=0)] [PoshCode.Pansies.RgbColor]$StartColor, [Parameter(Mandatory, Position=1)] [PoshCode.Pansies.RgbColor]$EndColor, [Parameter(Position=2)] [Alias("Length","Count","Steps")] [int]$Width = $Host.UI.RawUI.WindowSize.Width, [Parameter(Position=3)] [int]$Height = 1, [ValidateSet("CMY","CMYK","LAB","LCH","LUV","HunterLAB","HSL","HSV","HSB","RGB","XYZ","YXY")] $ColorSpace = "HunterLab", # For color spaces with Hue (HSL, HSV), setting this generates the gradient the long way [switch]$Reverse, [switch]$Flatten ) $Height = [Math]::Max(1, $Height) $Width = [Math]::Max(1, $Width) $Colors = new-object Rgb[][] $Height, $Width $C = [PSCustomObject]@{R = 0; G = 0; B = 0} # Simple pythagorean distance $Size = [Math]::Sqrt(($Height - 1) * ($Height - 1) + ($Width - 1) * ($Width - 1)) $Left = $StartColor."To$ColorSpace"() $Right = $EndColor."To$ColorSpace"() $StepSize = New-Object "${ColorSpace}Color" -Property @{ Ordinals = $( foreach ($i in 0..($Left.Ordinals.Count-1)) { ($Right.Ordinals[$i] - $Left.Ordinals[$i]) / $Size } ) } Write-Verbose "Size: $('{0:N2}' -f $Size) ($Width x $Height) ($($Colors.Length) x $($Colors[0].Length))" Write-Verbose "Diff: {$StepSize}" Write-Verbose "From: {$Left} $($StartColor.Ordinals)" Write-Verbose "To: {$Right} $($EndColor.Ordinals)" # For colors based on hue rotation, the math is slightly more complex: [bool]$RotatingColor = $StepSize | Get-Member H if($RotatingColor) { [Bool]$Change = [Math]::Abs($StepSize.H) -ge 180 / $Size if ($Reverse) { $Change = !$Change } if ($Change) { $StepSize.H = if ($StepSize.H -gt 0) { $StepSize.H - 360 / $Size } else { $StepSize.H + 360 / $Size } } $Ceiling = 360 } for ($Line = 1; $Line -le $Height; $Line++) { for ($Column = 1; $Column -le $Width; $Column++) { $D = [Math]::Sqrt(($Line - 1) * ($Line - 1) + ($Column - 1) * ($Column - 1)) $StepColor = New-Object "${ColorSpace}Color" -Property @{ Ordinals = $( foreach ($i in 0..$Left.Ordinals.Count) { $Left.Ordinals[$i] + $StepSize.Ordinals[$i] * $D } ) } # For colors based on hue rotation, the math is slightly more complex: if($RotatingColor) { if($StepColor.H -lt 0) { $StepColor.H += 360 } $StepColor.H %= $Ceiling } $Ordinals1 = $StepColor.Ordinals $Colors[$Line - 1][$Column - 1] = $StepColor.ToRgb() $Ordinals2 = $Colors[$Line - 1][$Column - 1].Ordinals Write-Debug ("Step ${Line},${Column}: {0:N2}, {1:N2}, {2:N2} => {3:N2}, {4:N2}, {5:N2}" -f $Ordinals1[0], $Ordinals1[1], $Ordinals1[2], $Ordinals2[0], $Ordinals2[1], $Ordinals2[2] ) } } if ($Flatten) { $Colors.GetEnumerator().GetEnumerator() } else { ,$Colors } } |